Dating young MORB of the Central Indian Ridge (19°S): Unspiked K-Ar technique limitations versus 40Ar/39Ar incremental heating method
作者: Hervé GuillouChristophe HémondBrad S. SingerJérôme Dyment
作者单位: 1Laboratoire des Sciences du Climat et de l’Environnement – IPSL, CEA-CNRS-USVQ, 91198 Gif sur Yvette, France
2UMR 6538 Domaines Océaniques, Université de Brest et CNRS, Institut Universitaire Européen de la Mer, Place N. Copernic, 29280 Plouzané, France
3Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton St, Madison, WI, 53706, USA
4Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR CNRS 7154, 1 rue Jussieu, 75238 Paris 05, France
刊名: Quaternary Geochronology, 2017, Vol.37 , pp.42-54
来源数据库: Elsevier Journal
DOI: 10.1016/j.quageo.2016.10.002
关键词: GeochronologyMORB40 Ar/ 39 Ar40 K/ 40 ArVolcanism
英文摘要: Abstract(#br)We have applied the unspiked K-Ar and the 40 Ar/ 39 Ar methods to samples precisely collected and localised, on both Central Indian Ridge flanks, to test their effectiveness and reliability when applied to the dating of recent (i.e. less than 1 Ma) MORBs. Twenty six samples) from the sixty five samples collected every ∼500 m up to the Brunhes-Matuyama boundary on both ridge flanks, were selected based on their distance from the ridge axis. Therefore, we can evaluate whether the isotopic ages are a good indicator of the crystallisation age by considering their geographic position with respect to the ridge axis (zero age) and the B/M magnetic boundary. Direct comparison of the isotopic and model ages shows that only 9 out of 26 samples were successfully dated. The GIMNAUT –...
全文获取路径: Elsevier  (合作)
分享到:
来源刊物:
影响因子:4.015 (2012)

×